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    Re: Differences between GPS and WWV time
    From: Rodney Myrvaagnes
    Date: 2001 Jun 22, 1:49 PM

    On Fri, 22 Jun 2001 15:25:58 -0400, Smith_Peter@EMC.COM
    >However, as Dan Allen noted, receivers' internal clocks often drift,
    >and shouldn't be trusted until the unit is tracking.
    Yes, but even if it is tracking, as Dan (I think) also
    noted, the display may not be updated fast enough. THis is
    more likely to be a problem with handheld devices, where
    battery life is a real consideration. Slowly clocked
    microprocessors use less power. If the unit is handling a
    bunch of other tasks, the screen update may wait.
    My old Traxar (1988) did not have this problem, but it ran
    through 6 AAs in 7 hours, and had a very simple display.
    It is annoying that one can't trust the display, even
    though you know that inside it knows the time to a tiny
    fraction of a second.
    Has anyone tested the fixed-mount versions of popular GPS
    families to see if they are better in this regard? I
    suspect the answer will be no, but they could take
    advantage of the ample power available from the boat or car
    Rodney Myrvaagnes                   J36 Gjoa     rodneym@attglobal.net
    Senior Editor           Electronic Products
    "Fireman saves pregnant squirrel"  -- Arizona Republic, Dec. 14, 2000

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